By The Epoch Calculator teamPublished
JavaScript date formatting bugsIntl.DateTimeFormat gotchastimezone aware date formattinglocale date formatting JavaScript
Date Formatting in JavaScript: Every Gotcha
Master JavaScript date formatting: locale bugs, timezone traps, DST edge cases, and Intl.DateTimeFormat patterns developers actually need.
We build practical, free time and date tools at epochcalc.com — every calculation runs in your browser using IANA tzdb via Luxon, so DST and zone math are correct by construction.